Brake mechanism for cars.



PATENTED AUG. 15, 1905.

F. L. CLARK. BRAKE MECHANISM FOR GAR$.

APPLICATION FILED DEC. 3, 1902.

2 SHEETS-SHEET l.

PATENTED AUGr. 15, 1905.

No. 797,098 F. L. CLARK.

BRAKE MECHANISM FOR CARS.

APPLIGATION FILED DEG/3, 1902.

2 SHEETS-BHEET 2.

Atty.

UNlTlil AIN FRANCIS L. CLARK, OF .PITTSBURG, PEN NSYLV ANIA, ASSIGNOR TO THE WESTINGHOUSE AIR BRAKE COMPANY, OF PllTlSBUl-IG, PENNSYL- VANIA, A CURPORATION OF PENNSYLVANIA.

BRAKE WIECHANIISWI FOW CAMS.

Specification of Letters Patent.

Patented Aug. 15, 1905.

Application filed December 3,1902. Serial No. 133,679l.

T0 (0M Iv/min 1 I/Mbj/ (vi/1 0077%: 1

Be it known that l, FRANCIS L. CLARK, a citizen of the United States, residingin Pittsburg, county of Allegheny. State of Pennsylvania, have invented a certain new and useful Improvement in Brake Mechanism for Cars, of which imrn'ovement the following is a specification.

My invention relates to brake mechanism for railway-cars, and has for its object to provide a new and improved brake mechanism of the type employing both wheel-shoes and rail-shoes, the wheel-shoes being applied by the longitudinal or dragging movement of the rail-shoe. This present invention is more especially adapted to be used in connection with cars having double trucks at each end; and it consists in an improved and compact arrangement of brake-levers and connections from the same to the wheel-shoes and to the rail-shoe and designed to be applied to the limited space available for such attachments on trucks of this type.

An embodiment of my invention is illustrated in the accompanying drawings, in which" l igurel is a plan view of the improved brake mechanism as applied to a double truck, the wheels and a portion of the trucle frame being indicated in dotted lines. Fig. 2 is a vertical longitudinal section taken substantially on the line :1; a: of Fig. 1, and Fig. 3 is a transverse section taken on the line 1 According to the construction shown in the drawings the rail-shoes 1 are joined by the truck-frame Q, the whole being suspended in its proper position, with the shoes 1 just above the rails, by means of the springs it is intended to employ magnetic rail-shoes,altho ugh this invention is not necessarily limited thereto, since it is obvious that any other means for forcing the rail-shoes down upon the rails might be used, if desired.

Each end of the rail-shoe is provided with a thrust-rod 4, formed in telescopic sections, one section being pivotally connected to the shoe and the other section pivotally connected with one end 0] a substantially horizontal lever 5, the other end of which is inlcrumed upon lugs 6, secured to the equalizer-bar 7. There are two pairs of these brake-levers 5, one on each side of the truck, and the levers of each pair are joined by intermialiate connecting rod or bar 8, to which they are pivotall y connected. These bars 7 are connected, by means of rods 9, with the brake-beams 10 ot' the WllGOl'SllOBS l1, which are preferably outside hung on account of the limited space available between the wheels.

Suitable hangers 12 are provided for supporting the equalizer-bars T, and vertical rods 13 are located between the levers 5 and a part of the truelc't'rame For the purpose of resisting the vertical component of the thrust from the thrust-rods a, and thus hold the levers in proper position.

A bracket 14, sum iorted from the truckframe, extends at each end 15 into close proximity to one of the lovers 5, thus forming an ultimate point of resistance or rigid fulcrum for the system.

\Vhen the car is moving and the rail-shoes are applied to the rail, the force due to the longitudinal or dragging movement of the rail-shoes is transmitted through the rear thrust-rods 4 to the outer ends of the corresponding levers 5 and acts. through the connecting-bars 8, to bring the opposite lovers of each pair against their rigid tulerums 15, thus forcing the equalizer-bars '7 toward each other and applying the wheel-shoes by means of connecting-rods 9. The wheel-shoes are applied with a force proportionate to that with which the rail-shoes are applied, and the operation is substantially the same when the car is moving in either direction.

It will be noted that the thrust-rods are located inside or between the rails, so as not to interfere with the wheels, and this feature, together with the horizontal arrangement of levers and bars, forms a very compact and efficient brake system and one especially adapted to double trucks, in which the wheels are located close together.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is---- l. in a car-brake mechanism, the combination of a rail-shoe, a substantially horizontal lever operated by the longitudinal or dragging movement of the rail-shoe, an equalizer-bar connected to said lever and wheel-shoes actuated by the equalizer-bar.

2. In a car-brake mechai'iism, the combination With a rail-shoe, and a pair of levers operated by the longitudinal or dragging movement of the rail-shoe, of a tie-bar pivotally connecting said levers, equalizer-bars actuated by said levers and wheel-shoes connected to said equalizer-bars.

3. A combined wheel and rail brake comprising two pairs of levers operated by the longitudinal or dragging movement of the rail-shoes and a pair of equalizer-bars actuated thereby and connected to the wheelshoes.

I. Ina car-brake mechanism, the combination of a rail-shoe, a substantially horizontal lever operated by the longitudinal or dragging movement of said rail-shoe, a wheel-shoe actuated by said lever, and a com pression-rod receiving the upward thrust on said lever.

5. In a car-brake mechanism, the combination of a pair of rail-shoes with connecting truck-frame, thrust-rods connected to said frame inside the track-rails, levers connected to said thrust-rods and operated by the longitudinal or dragging movement of the railshoes, a tie-bar connecting the levers together and wheel-shoes actuated by the levers.

6. In a car'bra-ke mechanism, the combination of a rail-shoe, a pair of pivotally-connected and substantially horizontal levers, thrust-rods connecting the rail-shoe with said levers, stationary fulcrums supported on the truck-frame, equalizer-bars actuated by the levers and wheel-shoes connected to said bars.

7. In a car-brake mechanism, the combination with a rail-shoe and a pair of substantially horizontal levers, of thrust-rods connecting the rail-shoe with said levers, a con necting-bar between the levers, stationary fulcrums supported on the truck-frame. compression-rods for receiving the upward thrust on the levers, and wheel-shoes operated by said levers.

In testimony whereof I have hereunto set my hand.

FRANCIS L. CLARK. \Vitnesses:

R. F. EMERY, JAs. 'B. MACDONALD. 

